I finally get it

The Sydney Archdiocese is about to launch into their World Youth Day 2008 campaign. They are using 'Activ8' as their slogan to get the youth moving. It took me some time, but I have just now worked out the significance of it... Act(s) I v.8. The theme of the thing! I'm not one for 'sms' language, but I suppose that it is quite clever.